CN1734313A - The image projection equipment of lighting unit and this lighting unit of employing - Google Patents

The image projection equipment of lighting unit and this lighting unit of employing Download PDF

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Publication number
CN1734313A
CN1734313A CNA2005100889191A CN200510088919A CN1734313A CN 1734313 A CN1734313 A CN 1734313A CN A2005100889191 A CNA2005100889191 A CN A2005100889191A CN 200510088919 A CN200510088919 A CN 200510088919A CN 1734313 A CN1734313 A CN 1734313A
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China
Prior art keywords
light beam
interphase
light source
lighting unit
outside surface
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Granted
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CNA2005100889191A
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Chinese (zh)
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CN100406960C (en
Inventor
李启薰
李元镛
李迎铁
索克洛夫·可里尔
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Publication of CN1734313A publication Critical patent/CN1734313A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • G02B27/145—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces
    • G02B27/146—Beam splitting or combining systems operating by reflection only having sequential partially reflecting surfaces with a tree or branched structure
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/18—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for optical projection, e.g. combination of mirror and condenser and objective
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B17/00—Systems with reflecting surfaces, with or without refracting elements
    • G02B17/002—Arrays of reflective systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
    • G02B27/0938—Using specific optical elements
    • G02B27/0994—Fibers, light pipes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1026—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators
    • G02B27/1033—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with reflective spatial light modulators having a single light modulator for all colour channels
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G02B27/102—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources
    • G02B27/1046—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators
    • G02B27/1053—Beam splitting or combining systems for splitting or combining different wavelengths for generating a colour image from monochromatic image signal sources for use with transmissive spatial light modulators having a single light modulator for all colour channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H01L33/60—Reflective elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Projection Apparatus (AREA)
  • Liquid Crystal (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A kind of lighting unit comprises the synthetic prisms of a plurality of light source cells that send light beam and the synthetic light beam that sends from a plurality of light source cells.Synthetic prisms comprises: first Tp has according to the direction of light beam input and comes first outside surface and first interphase and second interphase of transmission or folded light beam; Second Tp, have transmitted light beam second outside surface, be arranged in the face of second interfacial the 3rd interphase and the 4th interphase; The 3rd Tp has the direction of importing according to light beam and comes the 3rd outside surface of transmission or folded light beam, is arranged in the face of the 4th interfacial the 5th interphase and is arranged to and face first interfacial the 6th interphase; With the color separated part, be arranged between second interphase and the 3rd interphase, between the 4th interphase and the 5th interphase and in the position between the 6th interphase and first interphase at least one, come optionally transmission or folded light beam with wavelength according to each light beam.

Description

The image projection equipment of lighting unit and this lighting unit of employing
The application requires the right of priority at the 10-2004-61095 korean patent application of Korea S Department of Intellectual Property submission on August 3rd, 2004, and this application full disclosure in this for reference.
Technical field
General plotting of the present invention relates to a kind of lighting unit and a kind of image projection equipment that irradiates light beam, more particularly, relate to a kind of lighting unit and a kind of image projection equipment that adopts this lighting unit with improved prism with the synthetic light beam that sends from compact light source.
Background technology
Usually, lighting unit comprises light source that sends light beam in one direction and the lamp optical system of propagating light beam.Lighting unit is widely used in the image processing system that use itself can not produce light beam, produces the image projection equipment of image such as LCD device or digital micro-mirror device.
Adopt compact light-emitting device, be developed such as light emitting diode (LED) or laser diode lighting unit and image projection equipment as light source.Each the advantage of compact light-emitting device that can send light beam with redness, blueness and green wavelength is that colour wheel equipment mechanism that it does not need to add produces the coloured image in the panel type color image projection arrangement.In order to send versicolor light beam, need the mechanical hook-up of a plurality of compact light-emitting devices and synthetic versicolor light beam.
With reference to Fig. 1, lighting unit send have redness, the light beam of blueness and green wavelength, and comprise first to the 3rd led light source 11,12 that is arranged in diverse location and 13 and make from first to the 3rd led light source 11,12 and three prisms 20 of 13 light beams that sent with identical propagated.
Three prisms 20 comprise: three independent prisms of combining first are to prism P 1, P 2And P 3Be arranged on the first prism P 1With prism P 3Between first light filter 21; Be arranged on the second prism P 2With prism P 3Between second light filter 25.First light filter 21 and second light filter 25 come the light beam of optionally transmission or reflection incident according to the wavelength of incident beam.For example, 21 reflections of first light filter have the first light beam R of red wavelength, and transmission has the second light beam G and the 3rd light beam B of green wavelength and blue wavelength respectively.Second light filter, 25 reflections the 3rd light beam B, and the transmission second light beam G.
According to the critical angle total reflection principle, be input to the first prism P 1The first light beam R by the first prism P 1Exit surface 20a reflect fully, propagate towards first light filter 21 then.The first light beam R is reflected by first light filter 21, and through the first prism P 1Exit surface 20a to propagate along a paths.The second light beam G is sequentially by second light filter 25 and first light filter 21, and along with the identical propagated of the first light beam R.According to the critical angle total reflection principle, the 3rd light beam B is by prism P 3In the face of the first prism P 1Surperficial 20b reflect fully, propagate towards second light filter 25, by 25 reflections of second light filter, sequentially by prism P 3With the first prism P 1, and along with the first light beam R and the identical propagated of the second light beam G.Therefore, from first to the 3rd led light source 11,12 and 13 first to the 3rd light beam R, G that sent and B are synthesized to one another along identical propagated.
In being configured to aforesaid lighting unit, for making the 3rd light beam B by prism P 3Surperficial 20b reflect the first prism P fully 1With prism P 3The clearance G that must when its optical arrangement, be separated to be scheduled to AirThis be because, when using the critical angle total reflection principle, not only must be at prism P 3Surperficial 20b and the 3rd light beam B between shape at an angle, and must be at prism P 3Refractive index and its near refractive index between there are differences.Therefore, when by using three prisms 20 synthetic during from light beam that described a plurality of light sources send, the problem of existence is that the optical arrangement of three prisms 20 is difficult to.
In addition, when light beam is synthesized by three prisms 20, because its restriction on optical arrangement, has different wave length except sending, outside first to the 3rd light source such as red, blue and green light beam, it may be difficult that the other light source that sends for example yellow, reddish violet or glaucous light beam also is installed.Therefore, may be more limited with the scope of the color that is implemented than the lighting unit that uses four color light source.
Summary of the invention
Therefore, general plotting of the present invention provides a kind of lighting unit and a kind of image projection equipment that adopts this lighting unit, and wherein, the structure that synthesizes the prism of the light beam that is sent by compact light source is improved.
The additional aspect and the advantage of general plotting of the present invention will partly be illustrated in the following description, and partly will become clear from this description, or are understanded by the enforcement of general plotting of the present invention.
Aforementioned and/or other aspects of general plotting of the present invention and advantage can realize by a kind of lighting unit is provided, this lighting unit comprise the light beam that sends a plurality of light source cells with light beams of different wavelengths and synthetic incident so that the light beam that sends from described a plurality of light source cells one another along the synthetic prisms of identical propagated.This synthetic prisms comprises: first Tp, and have according to the direction of light beam input and come first outside surface of transmission or folded light beam, and first interphase and second interphase; Second Tp, have the light beam of transmission incident second outside surface, be arranged in the face of second interfacial the 3rd interphase and the 4th interphase; The 3rd Tp has the direction of importing according to light beam and comes the 3rd outside surface of transmission or folded light beam, is arranged in the face of the 4th interfacial the 5th interphase and is arranged to and face first interfacial the 6th interphase; With the color separated part, be arranged between second interphase and the 3rd interphase, between the 4th interphase and the 5th interphase and in the position between the 6th interphase and first interphase at least one, come optionally transmission or reflection with wavelength according to the light beam of incident.
First Tp, second Tp and the 3rd Tp can be of similar shape and size.In first Tp, second Tp and the 3rd Tp each can be isosceles triangle, wherein, angle between two interphases is 120 °, and formed angle is 30 ° between in outside surface and two interphases each.
Aforementioned and/or other aspects of general plotting of the present invention and advantage also can realize by a kind of image projection equipment is provided, and this image projection equipment comprises above-mentioned lighting unit, form corresponding to the image processing system of the image of the light beam that sends from lighting unit and amplify the image that formed by image processing system and enlarged image is projected to projecting lens unit on the screen.
Description of drawings
By coming embodiment is described below in conjunction with accompanying drawing, it is clear and easier to understand that these of general plotting of the present invention and/or other aspects and advantage will become, wherein:
Fig. 1 is the diagrammatic sketch that the optical arrangement of traditional lighting unit is shown;
Fig. 2 is the diagrammatic sketch that the optical arrangement of the lighting unit of the embodiment of general plotting according to the present invention is shown;
Fig. 3 is the skeleton view that the light source cell in the lighting unit of Fig. 2 is shown;
Fig. 4 is the side view that the light source cell in the lighting unit of Fig. 2 is shown;
Fig. 5 is the skeleton view that another example of the light source cell in the lighting unit of Fig. 2 is shown;
Fig. 6 is the diagrammatic sketch that the optical arrangement of the lighting unit of another embodiment of general plotting according to the present invention is shown;
Fig. 7 is the diagrammatic sketch that the optical arrangement of the lighting unit of another embodiment of general plotting according to the present invention is shown;
Fig. 8 is the diagrammatic sketch that the optical arrangement of the lighting unit of another embodiment of general plotting according to the present invention is shown;
Fig. 9 is the diagrammatic sketch of optical arrangement of image projection equipment that the embodiment of the general plotting according to the present invention is shown;
Figure 10 is the diagrammatic sketch of optical arrangement of image projection equipment that another embodiment of the general plotting according to the present invention is shown; With
Figure 11 is the diagrammatic sketch of optical arrangement of image projection equipment that another embodiment of the general plotting according to the present invention is shown.
Embodiment
To describe the embodiment of general plotting of the present invention now in detail, its example is shown in the drawings, and wherein, identical label is represented identical parts all the time.These embodiment are described below with reference to the accompanying drawings to explain general plotting of the present invention.
Fig. 2 shows the lighting unit according to the embodiment of general plotting of the present invention.With reference to Fig. 2, this lighting unit comprises: a plurality of light source cells 100, send and have light beams of different wavelengths; Synthetic prisms 200, thus each light beam that the light beam of synthetic incident is sent from described a plurality of light source cells 100 is along identical propagated.
Described a plurality of light source cell 100 comprises and is arranged on the diverse location and first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 that there are differences at the wavelength of the light beam that sends from it.That is, first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 send the first light beam L with different wave length respectively 11, the second light beam L 21With the 3rd light beam L 31, for example have the light beam of green wavelength, blue wavelength and red wavelength.
This synthetic prisms 200 with triangle column comprises first Tp 210, second Tp 220 and the 3rd Tp 230, and described each Tp has the outside surface and two interphases that link to each other with other two Tps that comes transmission or complete folded light beam according to the direction of light beam incident.At least one boundary between first Tp 210, second Tp 220 and the 3rd Tp 230 is provided with the color separated part, comes optionally transmission and reflection with the wavelength according to incident beam.
First Tp 210 has first interphase 211, second interphase 213 and comes first outside surface 215 of the light beam of transmission or reflection incident according to the direction of light beam incident.
First light source cell 110 is arranged in the face of first outside surface 215.Therefore, the first light beam L that sends from first light source cell 110 11Directly first outside surface 215 is passed through in transmission, and propagates towards second interphase 213.From second interphase 213 with greater than critical angle θ cAngle be incident on the first light beam L on first outside surface 215 11With the second light beam L 21Reflected fully by first outside surface 215, and propagate towards first interphase 211.Then, the first light beam L 11With the second light beam L 21Transmission is by the 3rd outside surface 235 of the 3rd Tp 230, and along identical propagated, described the 3rd Tp 230 will be described after a while.
The condition that total reflection takes place is: near the refractive index of its part of the refractive index ratio of first Tp 210 is big, and the first light beam L 11With the second light beam L 21In the inside of first Tp 210 with than critical angle θ cBig angle incident.
Second Tp 220 has second outside surface 225 of the light beam of the 3rd interphase 221, the 4th interphase 223 and transmission incident.The 3rd interphase 221 is arranged to second interphase 213 in the face of first Tp 210.
Secondary light source unit 120 and the 3rd light source cell 130 are arranged in the face of second outside surface 225.The second light beam L that sends from secondary light source unit 120 21Transmission by second outside surface 225 propagating towards the 3rd interphase 221, and the 3rd light beam L that sends from the 3rd light source cell 130 31Transmission is passed through second outside surface 225 to propagate towards the 4th interphase 223.
The 3rd Tp 230 has the 5th interphase 231, the 6th interphase 233 and comes the 3rd outside surface 235 of the light beam of transmission or reflection incident according to the direction of light beam incident.The 5th interphase 231 is arranged to the 4th interphase 223 in the face of second Tp 220, and the 6th interphase 233 is arranged to first interphase 211 in the face of first Tp 210.Therefore, the 3rd light beam L that sends from the 3rd light source cell 130 31Reflected fully by the 3rd outside surface 235, and propagate towards the 6th interphase 233.The 3rd light beam L 31Reflected fully by the 6th interphase 233 then.The first light beam L 11, the second light beam L 21With the 3rd light beam L that comes from the 6th interphase 233 31The 3rd outside surface 235 is passed through in transmission, and along identical propagated.
First Tp 210, second Tp 220 and the 3rd Tp 230 are of similar shape and size, therefore the first light beam L that imports from diverse location 11, the second light beam L 21With the 3rd light beam L 31One another along identical propagated.First Tp 210 can be an isosceles triangle, wherein, angle between first interphase 211 and second interphase 213 is 120 °, and the angle between the angle between first interphase 211 and first outside surface 215 and second interphase 213 and first outside surface 215 respectively is 30 °.Equally, second Tp 220 and the 3rd Tp 230 are the prisms with isosceles triangle shape and condition identical with first Tp 210.Second Tp 220 and the 3rd Tp 230 can be formed the single block with the 4th interphase 223 and the 5th interphase 231.
Color separated partly is disposed between second interphase 213 and the 3rd interphase 221, between the 4th interphase 223 and the 5th interphase 231 and in the position between the 6th interphase 233 and first interphase 211 at least one.In the embodiment of Fig. 2, color separated part can comprise be separately positioned between second interphase 213 and the 3rd interphase 221 and the 6th interphase 233 and first interphase 211 between first dichroic filter 241 and second dichroic filter 245.
The first light beam L in first wavelength coverage that 241 reflections of first dichroic filter are sent from first light source cell 110 11, and the second light beam L in second wavelength coverage that sends from secondary light source unit 120 of transmission 21For example, with respect to the presetted wavelength between green and blueness, the wavelength of 500nm for example, the light beam in longer wavelength scope relatively is reflected, and the light beam in shorter wavelength scope relatively is by transmission.Therefore, as the first light beam L 11Be the light beam and the second light beam L in the green wavelength scope 21When being the light beam in the blue wavelength region, the first light beam L 11By 241 reflections of first dichroic filter, the second light beam L 21Transmission is by first dichroic filter 241, and along with the first light beam L 11Identical propagated.
Second dichroic filter 245 is reflected in the wavelength range, for example the 3rd light beam L in the red wavelength range 31, and the first light beam L of transmission in other wavelength coverages 11With the second light beam L 21For example, with respect to the presetted wavelength between redness and green, the wavelength of 565nm for example, the light beam in longer wavelength scope relatively is reflected, and the light beam in shorter wavelength scope relatively is by transmission.Therefore, as the first light beam L 11With the second light beam L 21Be light beam and the 3rd light beam L in green and the blue wavelength region 31When being the light beam in the red wavelength range, the first light beam L 11With the second light beam L 21Transmission is by second dichroic filter 245, and the 3rd light beam L 31By the reflection of second dichroic filter 245 and along with the first light beam L 11With the second light beam L 21Identical propagated.
Shown in Fig. 3 to 5, each in first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 is made of at least one optical module 140.
With reference to Fig. 3 to Fig. 5, optical module 140 comprises the collimator 150 with reflecting surface and sends the light source 160 with light beams of predetermined wavelengths.Collimator 150 comprises the glass bar 155 that has paraboloidal first reflecting surface 151 and have the square-section.Light source 160 is the compact light source with at least one light emitting diode (LED) or laser diode, and its luminous component is positioned on the focal point F of first reflecting surface 151 and near.First reflecting surface 151 is processed as parabola and reflects coating (reflection-coating) in this paraboloidal outside by the part with glass bar 155 and forms.Collimator 150 also has second reflecting surface 153 that forms in the face of first reflecting surface 151 on the part of collimator 150.Second reflecting surface 153 reflects to apply by the part at the collimator 150 except that the regional G that light beam passed through that directly sends from light source 160 and forms.
Light beam in the predetermined angle of radiation scope of the light beam that sends from light source 160 is reflected by first reflecting surface 151, and becomes parallel beam.Parallel beam is by the inside of glass bar 155 and by exit surface 157.Simultaneously, because the luminous component of light source 160 do not form a bit, but a predetermined zone is arranged, therefore not every luminous component can both be disposed on the focal point F.Therefore, the segment beam that sends from light source 160 is reflected by first reflecting surface 151, and propagates towards second reflecting surface 153.The light beam of second reflecting surface, 153 reflection incidents is to propagate towards exit surface 157.Here, each exit surface 157 can be placed to facing corresponding in first outside surface 215, second outside surface 225 and the 3rd outside surface 235 of synthetic prisms 200.
Because optical module 140 uses first reflecting surface 151 rather than use lens to make the light beam that sends from light source 160 become directional light, therefore because the principle that produces when using lens limits, the problem that the efficient of being brought than (etendue) such as flux illumination reduces can be solved fully.
Although described the collimator 150 that uses glass bar 155 above, but general plotting of the present invention is not limited to this, one side and can forming parabola and forming reflecting surface by reflecting the inside of handling the optics tunnel at the optics tunnel (not shown) with hollow rather than glass bar 155.
In the lighting unit of Fig. 2, each in first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 can be made of a plurality of optical modules 140 that are arranged in array, as shown in Figure 5.In this case, each optical module 140 that constitutes each first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 send have redness, the light beam of green or blue wavelength.Therefore, send each light beam, can send the panchromatic light beam that forms by with these light beam combinations by simultaneously or in a sequence driving first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130.In addition, when image projection equipment that above-mentioned lighting unit is applied to will describing after a while, need not just can irradiate column of colour by colorific colour wheel.
In being configured to aforesaid lighting unit, owing to use the synthetic prisms 200 synthetic light beams that send from first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 with triangular prism structure, therefore use the critical angle total reflection principle can change light path at an easy rate, and compare with three traditional prism structures, it is easy that optical arrangement becomes.
Fig. 6 is the diagrammatic sketch that illustrates according to the optical arrangement of the lighting unit of another embodiment of general plotting of the present invention.With reference to Fig. 6, this lighting unit comprises: a plurality of light source cells 100, send and have light beams of different wavelengths; With synthetic prisms 200, thereby each light beam that the light beam of synthetic incident is sent from this light source cell 100 is along identical propagated.
In the embodiment of the Fig. 6 that compares with the embodiment of Fig. 2, consider the total reflection character of synthetic prisms 200 at first outside surface 215 and the 3rd outside surface 235, also be provided with first reflection horizon 251 and second reflection horizon 255.Yet except above layer 251 and 255,, therefore omit its detailed description here because the structure and the layout of other building blocks are substantially the same with the lighting unit of Fig. 2.
Apply and form first reflection horizon 251 by the part of first outside surface 215 being carried out total reflection, to reflect fully by 241 reflections of first dichroic filter or the first light beam L by first dichroic filter 241 11With the second light beam L 21Because first reflection horizon 251 is not at the first light beam L of first outside surface 215 11A part of directly sending from first light source cell 110 forms, so it does not influence the first light beam L 11Propagate towards first dichroic filter 241.
Apply and form second reflection horizon 255 by the part of the 3rd outside surface 235 being carried out total reflection, to reflect the 3rd light beam L that directly sends from the 3rd light source cell 130 31Because second reflection horizon 255 is not formed on such light path, by second dichroic filter 245 or by the first light beam L of second dichroic filter, 245 reflections 11, the second light beam L 21With the 3rd light beam L 31Propagate along described light path, so it does not influence the first light beam L 11, the second light beam L 21With the 3rd light beam L 31Propagate by the 3rd outside surface 235.When first reflection horizon 251 and second reflection horizon 255 were formed on synthetic prisms 200, the light beam of incident can be with greater than critical angle θ cAngle incident.
Fig. 7 is the diagrammatic sketch that illustrates according to the optical arrangement of the lighting unit of another embodiment of general plotting of the present invention.With reference to Fig. 7, thereby this lighting unit comprises each light beam that the light beam that sends a plurality of light source cells 300 with light beams of different wavelengths and synthetic incident sent from these a plurality of light source cells 300 synthetic prisms 400 along identical propagated.
This light source cell 300 comprises first light source cell 310, secondary light source unit 320, the 3rd light source cell 330 and the 4th light source cell 340 that is arranged on the diverse location and there are differences at the wavelength of the light beam that sends from it.That is, first light source cell 310, secondary light source unit 320, the 3rd light source cell 330 and the 4th light source cell 340 send the first light beam L with different wave length respectively 12, the second light beam L 22, the 3rd light beam L 32With the 4th light beam L 42, the light beam that for example has green wavelength, blue wavelength, red wavelength and yellow wavelengths.Because the structure of each in first light source cell 310, secondary light source unit 320, the 3rd light source cell 330 and the 4th light source cell 340 is all described identical with reference Fig. 3 to Fig. 5, therefore omit its detailed description here.
This synthetic prisms 400 has the triangle column, and comprise first Tp 410, second Tp 420 and the 3rd Tp 430, described each Tp has the outside surface and two interphases that link to each other with other two Tps that comes transmission or complete folded light beam according to the direction of light beam incident.At least one place in the boundary between first Tp 410, second Tp 420 and the 3rd Tp 430 is provided with the color separated part, comes optionally transmission or reflection with the wavelength according to the light beam of incident.
First Tp 410 comprises first interphase 411, second interphase 413 and comes the outside surface 415 of the light beam of transmission or reflection incident according to the wavelength of light beam.Second Tp 420 comprises second outside surface 425 of the light beam of the 3rd interphase 421, the 4th interphase 423 and transmission incident.The 3rd Tp 430 comprises the 5th interphase 431, the 6th interphase 433 and comes the 3rd outside surface 435 of the light beam of transmission or reflection incident according to the wavelength of light beam.The layout of each in first Tp 410, second Tp 420 and the 3rd Tp 430 and the layout of first light source cell 310, secondary light source unit 320 and the 3rd light source cell 330 are identical with the layout of first Tp 210, second Tp 220 and the 3rd Tp 230 and the layout of first light source cell 110, secondary light source unit 120 and the 3rd light source cell 130 among Fig. 2 basically.
The 4th light source cell 340 is arranged in the face of the 3rd outside surface 435.Therefore, the 4th light beam L that sends from the 4th light source cell 340 42Transmission is passed through the 3rd outside surface 435 to propagate towards the 5th interphase 431.
In the embodiment of Fig. 7, color separated partly comprise be separately positioned between second interphase 413 and the 3rd interphase 421, between the 6th interphase 433 and first interphase 411 and first dichroic filter 441, second dichroic filter 445 and the 3rd dichroic filter 447 between the 4th interphase 423 and the 5th interphase 431.
The 3rd dichroic filter 447 is set to separate respectively the 3rd light beam L that sends from the 3rd light source cell 330 and the 4th light source cell 340 32With the 4th light beam L 42The 3rd light beam L in wavelength range that 447 transmissions of the 3rd dichroic filter are sent from the 3rd light source cell 330 32, and reflect the 4th light beam L in the 4th wavelength coverage that sends from the 4th light source cell 340 42For example, with respect to the presetted wavelength between redness and the yellow, the wavelength of 600nm for example, the light beam in longer wavelength scope relatively be by transmission, and the light beam in shorter wavelength scope relatively is reflected.Therefore, as the 3rd light beam L 32Be light beam and the 4th light beam L in red wavelength range 42When being the light beam in the yellow wavelengths scope, the 3rd light beam L 32By 447 transmissions of the 3rd dichroic filter, and the 4th light beam L 42Be reflected, thereby this two-beam is along identical propagated.
Because first dichroic filter 441 and second dichroic filter 445 are carried out basically first dichroic filter 241 and second dichroic filter, 245 identical operations with Fig. 2, therefore omit its detailed description here.Second dichroic filter, 445 transmissions, the first light beam L 12With the second light beam L 22, and reflect the 3rd light beam L 32With the 4th light beam L 42Thereby these light beams are along identical propagated.
In order to widen the color gamut of lighting unit, the 4th light beam L 42Not only be not limited to have the light beam of yellow wavelengths, and can be changed to having the light beam of various wavelength.For example, can comprise the light source cell that sends light beam with reddish violet or blue-green wavelengths.In addition, although the first light beam L 12, the second light beam L 22, the 3rd light beam L 32With the 4th light beam L 42Be described to send light beam above, but general plotting of the present invention is not limited thereto with green, blueness, redness and yellow wavelengths.Promptly by changing the layout of first to the 3rd dichroic filter, multiple variation is possible.
In the lighting unit of Fig. 7, by the synthetic prisms 400 synthetic light beams that send from first light source cell 310, secondary light source unit 320, the 3rd light source cell 330 and the 4th light source cell 340 that use the Tp type, use the critical angle total reflection principle can change light path at an easy rate, and compare optical arrangement with the structure of traditional three prisms and become easy.In addition, owing to realize image by making up four kinds of colors, therefore the scope of the color that presents is broadened.
Fig. 8 is the diagrammatic sketch that illustrates according to the optical arrangement of the lighting unit of another embodiment of general plotting of the present invention.With reference to Fig. 8, this lighting unit comprises: a plurality of light source cells 300, send and have light beams of different wavelengths; With synthetic prisms 400, thereby each light beam that the light beam of synthetic incident is sent from light source cell 300 is along identical propagated.
The lighting unit of Fig. 8 and the lighting unit of Fig. 7 are similar, and comprise that first reflection horizon 451 and second reflection horizon 455 are to strengthen the total reflection character of synthetic prisms 400 at first outside surface 415 and the 3rd outside surface 435 places.Basically the lighting unit with Fig. 7 is identical because the structure of other building blocks is with layout, therefore omits its detailed description here.
Apply and form first reflection horizon 451 by the part of first outside surface 415 being carried out total reflection, to reflect fully by 441 reflections of first dichroic filter or the first light beam L by first dichroic filter 441 12With the second light beam L 22Because first reflection horizon 451 is not at the first light beam L of first outside surface 415 12A part of directly sending from first light source cell 310 forms, and therefore first reflection horizon 451 does not influence the first light beam L 12Propagate towards first dichroic filter 441.
Apply and constitute second reflection horizon 455 by carry out total reflection in the part of the 3rd outside surface 435, with reflection by 447 reflections of the 3rd dichroic filter or the 3rd light beam L by the 3rd dichroic filter 447 32With the 4th light beam L 42Because second reflection horizon 455 is not formed on such light path, by second dichroic filter 445 or by the first light beam L of second dichroic filter, 445 reflections 12, the second light beam L 22, the 3rd light beam L 32With the 4th light beam L 42Propagate along described light path, so it does not influence the first light beam L 12, the second light beam L 22, the 3rd light beam L 32With the 4th light beam L 42Propagation.
Fig. 9 is the diagrammatic sketch that illustrates according to the optical arrangement of the image projection equipment of the embodiment of general plotting of the present invention.With reference to Fig. 9, this image projection equipment comprises: lighting unit 500; Image processing system 550 forms the corresponding image of picture signal with the light beam that sends from lighting unit 500; With projecting lens unit 560, amplification projects on the screen 570 by image processing system 550 formed images and with it.
This lighting unit 500 comprises a plurality of light source cells and synthetic prisms, with the synthetic a plurality of light beams that send from a plurality of light source cells, and sends light beam by the synthetic light beam that sends from a plurality of light source cells that are arranged in diverse location.Since the structure of this lighting unit 500 basically with Fig. 2, Fig. 6, Fig. 7 and Fig. 8 in lighting unit in one identical, therefore omit its detailed description here.Be actuated to sequentially be sent the light beam of three kinds or more colors, for example have the light beam of green, blueness and red wavelength or have the light beam of green, blueness, redness and yellow (or reddish violet or blue-green) wavelength by the light source cell of this lighting unit 500 of opening and closing sequentially.Therefore, when using single face template image processing system to come the composing images projector equipment, employed colour wheel (not shown) when this lighting unit 500 can replace producing coloured image.
Image processing system 550 is by being that the uniform illuminating bundle that unit optionally reflects incident forms image with the pixel.This image processing system 550 can be that reflective liquid crystal shows (LCD) device, transmission-type LCD device or digital micro-mirror device (DMD).Reflection type LCD device and transmission-type LCD device use the polarization properties of the light beam of incident to produce image, and DMD does not use polarization properties.Therefore, when DMD is used as this image processing system 550, do not need other polarization converter or polarizer.
As shown in Figure 9, DMD is used as this image processing system 550.DMD comprises the micro mirror array of bidimensional, and micro mirror is driven on described bidimensional independently, and DMD forms image according to received image signal by the reflection angle that light beam is set independently for each pixel.In this case, as the unit in the path of the light beam that changes incident, beam splitter 540 also is set between this image processing system 550 and the projecting lens unit 560.This beam splitter 540 changes the path of incident beams, thus the light beam that comes from lighting unit 500 propagate towards image processing system 550, the light beam that comes from image processing system 550 is propagated towards screen 570.This beam splitter 540 is to use critical angle total reflection character to change the critical angle prism in the path of light beam.
Projecting lens unit 560 is arranged in the face of this beam splitter 540, and amplifies the image that is synthesized and passed through this beam splitter 540 by image processing system 550, and towards screen 570 projection enlarged images.
Image projection equipment as shown in Figure 9 also comprises and being arranged between lighting unit 500 and the beam splitter 540 so that the light beam that sends from lighting unit 500 becomes the optical integrator 520 of directional light.This optical integrator 520 can be the glass bar with cube shaped, and light beam is propagated in by total reflection therein.In this case, the condenser lens unit 510 of gathering incident light also is set between light source cell 500 and this optical integrator 520.This condenser lens unit 510 is made up of at least one lens unit, and the parallel beam of gathering incident is incident on the glass bar it.
This image projection equipment also comprises the relay lens unit 530 that is arranged between optical integrator 520 and the beam splitter 540.Relay lens unit 530 is made up of at least one lens, is positioned at the DMD (image synthesizer 550) that image forms the position being delivered to from the uniform beam of glass bar output.
Figure 10 is the diagrammatic sketch that illustrates according to the optical arrangement of the image projection equipment of another embodiment of general plotting of the present invention.With reference to Figure 10, this image projection equipment comprises: lighting unit 600; Image processing system 650 forms the corresponding image of picture signal with the light beam that sends from lighting unit 600; With projecting lens unit 660, amplify the image that forms by image processing system 650 and it is projected on the screen 670.Since the structure of lighting unit 600 basically with the lighting unit of Fig. 2, Fig. 6, Fig. 7 and Fig. 8 in one identical, therefore omit its detailed description here.
Image processing system 650 is by being that the uniform illumination light that unit optionally reflects incident forms image with the pixel.As shown in figure 10, the reflection type LCD device that utilizes the polarization properties of incident beam to produce image is used as this image processing system 650.
In this case, as the unit in the path of the light beam that changes incident, this projector equipment also comprises the polarization beam splitter 640 that is arranged between lighting unit 600, image processing system 650 and the projecting lens unit 660.This polarization beam splitter 640 changes the path of incident beams, thus the incident beam that comes from lighting unit 600 propagate towards image processing system 650, and the incident beam that comes from image processing system 650 is propagated towards screen 670.For this reason, changing the polarization modifier of the polarization direction of the light beam of incident propagating towards polarization beam splitter 640 with the light beam that allows to have specific polarization 630 is disposed between lighting unit 600 and the polarization beam splitter 640.This polarization modifier 630 comprises the polarization beam splitter and the quarter-wave plate of a plurality of compactnesses, and most of unpolarized incident beams are changed into the light beam with specific polarization.Because the structure of this polarization modifier 630 is well-known, therefore omit its detailed description here.
This image projection equipment also comprises the optical integrator 620 that makes the light beam that sends from lighting unit 600 become uniform light beam.This optical integrator 620 is made of the fly eye lens array that comprises at least one fly's-eye lens, and described fly's-eye lens comprises each in the lens unit with projection or cylindrical shape of a plurality of arrangements adjacent one another are.
Figure 11 is the diagrammatic sketch that illustrates according to the optical arrangement of the image projection equipment of another embodiment of general plotting of the present invention.With reference to Figure 11, this image projection equipment comprises: lighting unit 700; Image processing system 740 forms the corresponding image of picture signal with the light beam that sends from lighting unit 700; With projecting lens unit 760, amplification projects on the screen 770 by image processing system 740 formed images and with it.Since the structure of lighting unit 700 basically with the lighting unit of Fig. 2, Fig. 6, Fig. 7 and Fig. 8 in one identical, therefore omit its detailed description here.
Image processing system 740 is by being that the uniform illumination light that unit optionally reflects incident forms image with the pixel.As shown in figure 11, the transmission-type LCD device that utilizes the polarization properties of the light beam of incident to produce image is used as this image processing system 740.In this case, because the unit in the path of the light beam of change incident is not essential, therefore different with the image projection equipment of Fig. 9 and Figure 10, its advantage is not need beam splitter.
Because transmission-type LCD device uses polarization properties to form image, therefore also is provided with polarization modifier 730 between lighting unit 700 and image processing system 740.In addition, image processing system also comprises the optical integrator 720 that makes the incident beam that sends from lighting unit 700 become uniform light beam.Optical integrator 720 is made of the fly eye lens array that comprises at least one fly's-eye lens unit, and described fly's-eye lens unit comprises each in the lens unit with projection or cylindrical shape of a plurality of arrangements adjacent one another are.
In lighting unit, according to general plotting of the present invention, synthesize the light beam that sends from first, second and the 3rd light source cell owing to have the synthetic prisms of triangular prism structure by use, therefore use the critical angle total reflection principle can change the path of light beam at an easy rate, and compare with three traditional prism structures, it is easy that optical arrangement becomes.In addition, when constituting light source cell, owing to make light beam become directional light by use reflecting surface rather than lens, therefore owing to the principle restriction that produces when using lens, the problem that compares the efficient reduction that is brought such as flux illumination can be solved fully.Other when sending the light source cell of the 4th light beam when being provided with, the scope of the color that will represent can be widened, and the light beam of multiple color can be irradiated.
In addition, owing to comprise lighting unit, therefore can do the structure of lighting unit compact according to the image projection equipment of general plotting of the present invention.In addition, owing to irradiate column of colour by using first, second and the 3rd light source cell to irradiate to have light beams of different wavelengths, colour wheel that therefore need not be other just can produce coloured image.
Although illustrated and described several embodiment of general plotting of the present invention, but it should be appreciated by those skilled in the art, under the situation of principle that does not break away from general plotting of the present invention and spirit, can change these embodiments, the scope of general plotting of the present invention is limited by appended claim and equivalent thereof.

Claims (31)

1, a kind of lighting unit comprises:
Send a plurality of light source cells with light beams of different wavelengths; With
The synthetic light beam that sends from described a plurality of light source cells is with the synthetic prisms one another along identical propagated, and this synthetic prisms comprises:
First Tp comprises first outside surface that comes the first of transmission or folded light beam according to the direction of light beam input, and first interphase and second interphase,
Second Tp, comprise the second portion of transmitted light beam second outside surface, be arranged in the face of second interfacial the 3rd interphase and the 4th interphase,
The 3rd Tp, comprise according to the direction of light beam input come the first of transmission or folded light beam and second portion the 3rd outside surface, be arranged in the face of the 4th interfacial the 5th interphase and be arranged in the face of first interfacial the 6th interphase and
The color separated part, be arranged between second interphase and the 3rd interphase, between the 4th interphase and the 5th interphase and in the position between the 6th interphase and first interphase at least one, come optionally transmission or folded light beam with wavelength according to each light beam.
2, lighting unit according to claim 1, wherein, first Tp, second Tp and the 3rd Tp are of similar shape and size each other.
3, lighting unit according to claim 2, wherein, in first Tp, second Tp and the 3rd Tp each is isosceles triangle, wherein, angle between two interphases is 120 °, and formed angle is 30 ° between in outside surface and two interphases each.
4, lighting unit according to claim 1, wherein, in described a plurality of light source cell each comprises at least one optical module, this optical module send parallel beam and comprise collimator with reflecting surface and be placed in the reflecting surface facing surfaces on the light source that sends corresponding a kind of light beam with corresponding a kind of wavelength.
5, lighting unit according to claim 4, wherein, described light source is made of one or more led light source or the laser diode that form array.
6, lighting unit according to claim 1, wherein, described light beam comprises first light beam, second light beam and the 3rd light beam, and color separated partly comprises:
First dichroic filter is arranged between second interphase and the 3rd interphase, to be reflected in first light beam and second light beam of transmission in second wavelength coverage in first wavelength coverage; With
Second dichroic filter is arranged between the 6th interphase and first interphase, to be reflected in the 3rd light beam and first light beam and second light beam of transmission in second wavelength coverage in the wavelength range.
7, lighting unit according to claim 6, wherein, described a plurality of light source cells comprise:
First light source cell is arranged in the face of first outside surface, to send first light beam towards first dichroic filter;
The secondary light source unit is arranged in the face of second outside surface, to send second light beam towards first dichroic filter; With
The 3rd light source cell is arranged in the face of second outside surface, to send the 3rd light beam towards the 5th interphase.
8, lighting unit according to claim 7, wherein, first light source cell and secondary light source unit are disposed such, thereby first light beam and second light beam via the first dichroic filter incident are reflected fully by first outside surface, and through second dichroic filter propagating towards the 3rd outside surface, and
The 3rd light source cell is disposed such, thereby is reflected to propagate towards second dichroic filter by the 3rd outside surface from the 3rd light beam that the 3rd light source cell sends.
9, lighting unit according to claim 7, wherein, the part of each in first outside surface and the 3rd outside surface is applied by total reflection, to reflect first light beam and second light beam and direct the 3rd light beam that sends from the 3rd light source cell via the first dichroic filter incident respectively.
10, lighting unit according to claim 6, wherein, described light beam also comprises the 4th light beam, and color separated part also comprises and being arranged between the 4th interphase and the 5th interphase being reflected in the 4th light beam in the 4th wavelength coverage and transmission the 3rd dichroic filter at the 3rd light beam of wavelength range, and the second dichroic filter transmission, first light beam and second light beam and reflect the 3rd light beam and the 4th light beam.
11, lighting unit according to claim 10, wherein, light source cell comprises:
First light source cell is arranged to and faces first outside surface to send first light beam towards first dichroic filter;
The secondary light source unit is arranged to and faces second outside surface to send second light beam towards first dichroic filter;
The 3rd light source cell is arranged to and faces second outside surface to send the 3rd light beam towards the 3rd dichroic filter; With
The 4th light source cell is arranged to and faces the 3rd outside surface to send the 4th light beam towards the 3rd dichroic filter.
12, lighting unit according to claim 11, wherein, first light source cell and secondary light source unit are disposed such, thereby first light beam and second light beam via the first dichroic filter incident are reflected fully by first outside surface, and through second dichroic filter propagating towards the 3rd outside surface, and
The 3rd light source cell and the 4th light source cell are disposed such, thereby are reflected fully by the 3rd outside surface respectively and propagate towards second dichroic filter via the 3rd light beam of the 3rd dichroic filter incident and the 4th light beam.
13, lighting unit according to claim 11, wherein, each in first outside surface and the 3rd outside surface comprises that the part that applied by total reflection is to reflect respectively via first light beam of the first dichroic filter incident and second light beam and via the 3rd light beam and the 4th light beam of the 3rd dichroic filter incident.
14, a kind of lighting unit comprises:
Send a plurality of light source cells with multiple light beams of predetermined wavelengths; With
The triangle synthetic prisms comprises:
A plurality of Tps are arranged to the formation triangle, thus the light beam that sends from described a plurality of light source cells by the surface reflection of a plurality of Tps or transmission, with one another along identical path from the triangle synthetic prisms be output and
One or more dichroic filter, each is placed between in described a plurality of Tp two, with the light beam that the wavelength according to light beam reflects or transmission is sent from described a plurality of light source cells.
15, lighting unit according to claim 14, wherein, the triangle synthetic prisms also comprises:
The reflection horizon of one or more setting, each is set at the part place of the outside surface of triangle synthetic prisms, to reflect the light beam that sends from described a plurality of light source cells fully.
16, lighting unit according to claim 14, wherein, described a plurality of light source cells are placed in a plurality of parts place of the outside surface of triangle synthetic prisms, with beam emissions in the triangle synthetic prisms.
17, lighting unit according to claim 14, wherein, the light beam that sends from described a plurality of light source cells comprises:
Red beam;
Green beam; With
Blue light beam.
18, lighting unit according to claim 17, wherein, the light beam that sends from described a plurality of light source cells also comprises:
At least a in yellow light beam, blue-green light beam and the reddish violet light beam.
19, lighting unit according to claim 14, wherein, described a plurality of Tps are arranged to the formation equilateral triangle.
20, lighting unit according to claim 14, wherein, described a plurality of Tps comprise:
Three isosceles triangles that are arranged to the congruence that forms equilateral triangle.
21, a kind of image projection equipment comprises:
Lighting unit comprises:
Send a plurality of light source cells with light beams of different wavelengths and
The synthetic light beam that sends from described light source cell is with the synthetic prisms one another along identical propagated, and this synthetic prisms comprises:
First Tp comprises first outside surface that comes the first of transmission or folded light beam according to the direction of light beam input, and first interphase and second interphase,
Second Tp, comprise the second portion of transmitted light beam second outside surface, be arranged in the face of second interfacial the 3rd interphase and the 4th interphase,
The 3rd Tp, comprise according to the direction of light beam input come the first of transmission or folded light beam and second portion the 3rd outside surface, be arranged in the face of the 4th interfacial the 5th interphase and be arranged in the face of first interfacial the 6th interphase and
The color separated part, be arranged between second interphase and the 3rd interphase, between the 4th interphase and the 5th interphase and in the position between the 6th interphase and first interphase at least one, come optionally transmission or folded light beam with wavelength according to each light beam;
Image processing system forms corresponding to the image by the synthetic light beam of lighting unit;
Projecting lens unit is amplified the image and the projection enlarged image that are formed by image processing system; With
The screen of the image of Display projector.
22, image projection equipment according to claim 21 also comprises being arranged between lighting unit and the image processing system so that the light beam that sends from lighting unit becomes the optical integrator of uniform light beam.
23, image projection equipment according to claim 22, wherein, optical integrator comprises the glass bar with cube structure that the light beam that sends from lighting unit is delivered to its inside by complete folded light beam.
24, image projection equipment according to claim 22, wherein, optical integrator comprises the fly eye lens array that comprises at least one fly's-eye lens, and described fly's-eye lens comprises each in the lens unit with projection or cylindrical shape of a plurality of arrangements adjacent one another are.
25, image projection equipment according to claim 22, wherein, image processing system comprises by optionally reflecting the uniform light beam that sends from optical integrator and comes the reflection-type image processing system of composograph, and comprises:
Beam splitter, be arranged between lighting unit and the image processing system to change the path of uniform light beam and image, thereby propagate towards image processing system from the uniform light beam that optical integrator sends, and propagate towards projecting lens unit by the image that image processing system forms.
26, image projection equipment according to claim 25, wherein, the reflection-type image processing system comprises digital micro-mirror device, and beam splitter comprises that the inner full-reflection mirror is fully to reflect uniform light beam that sends from optical integrator and the image that is formed by digital micro-mirror device towards the projecting lens unit transmission towards digital micro-mirror device.
27, image projection equipment according to claim 25 also comprises:
The polarization modifier, be arranged between lighting unit and the beam splitter, propagate towards beam splitter to make uniform light beam by the polarization direction that changes uniform light beam with specific polarization, wherein, the reflection-type image processing system comprises reflection type LCD device, and beam splitter comprises according to its polarization direction coming transmission or reflecting the polarization beam splitter of uniform light beam and image.
28, image projection equipment according to claim 22 also comprises:
The polarization modifier, be arranged between lighting unit and the image processing system so that the uniform light beam with specific polarization is propagated towards image processing system, wherein, image processing system comprises that the uniform light beam that sends from optical integrator by transmission optionally forms the transmission-type LCD device of image.
29, a kind of image projection equipment comprises:
Lighting unit comprises:
Send a plurality of light source cells with a plurality of light beams of predetermined wavelengths,
The triangle synthetic prisms, comprise being arranged to and form leg-of-mutton a plurality of Tps, thereby the light beam that sends from described a plurality of light source cells is by the surface reflection of described a plurality of Tps or transmission, with one another along identical path from the triangle synthetic prisms be output and
One or more dichroic filter, each is placed between in described a plurality of Tp two, with the light beam that the wavelength according to light beam reflects or transmission is sent from described a plurality of light source cells; With
Display device shows the image corresponding to the light beam of exporting from the triangle synthetic prisms.
30, image projection equipment according to claim 29, wherein, display device comprises:
Display unit forms the image corresponding to the light beam of exporting from the triangle synthetic prisms;
Projecting lens unit is amplified this image and projection enlarged image; With
The screen of the image of Display projector.
31, image projection equipment according to claim 30, wherein, display unit comprises among digital micro-mirror device, reflection type LCD or the transmission-type LCD.
CN2005100889191A 2004-08-03 2005-08-01 Illumination unit and image projecting apparatus employing the same Expired - Fee Related CN100406960C (en)

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